Figure 1: Proportional measures of frequency that the search terms “anesthesiadementia” and “surgery dementia” were entered by users at the main googlesearch page ( over the time period 2004 – 2010 (X axis).Each measured time point is expressed as a normalized percentage of thesearch frequency (Y axis). This is the screen shot from the authors’ computerusing Google Insights for Search (; accessed:March 6, 2012).